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    <center>Scilab Function</center>
    <div align="right">Last update : April 1993</div>
    <p>
      <b>cont_mat</b> -  controllability matrix</p>
    <h3>
      <font color="blue">Calling Sequence</font>
    </h3>
    <dl>
      <dd>
        <tt>Cc=cont_mat(A,B)   </tt>
      </dd>
      <dd>
        <tt>Cc=cont_mat(sl)  </tt>
      </dd>
    </dl>
    <h3>
      <font color="blue">Parameters</font>
    </h3>
    <ul>
      <li>
        <tt>
          <b>a,b</b>
        </tt>: two real matrices of appropriate dimensions</li>
      <li>
        <tt>
          <b>sl</b>
        </tt>: linear system (<tt>
          <b>syslin</b>
        </tt> list)</li>
    </ul>
    <h3>
      <font color="blue">Description</font>
    </h3>
    <p>
      <tt>
        <b>cont_mat</b>
      </tt> returns the controllability 
    matrix of the pair <tt>
        <b>A,B</b>
      </tt> (resp. of the system <tt>
        <b>sl=[A,B,C,D]</b>
      </tt>).</p>
    <pre>

Cc=[B, AB, A^2 B,..., A^(n-1) B]  
   
    </pre>
    <h3>
      <font color="blue">See Also</font>
    </h3>
    <p>
      <a href="ctr_gram.htm">
        <tt>
          <b>ctr_gram</b>
        </tt>
      </a>,&nbsp;&nbsp;<a href="contr.htm">
        <tt>
          <b>contr</b>
        </tt>
      </a>,&nbsp;&nbsp;<a href="canon.htm">
        <tt>
          <b>canon</b>
        </tt>
      </a>,&nbsp;&nbsp;<a href="st_ility.htm">
        <tt>
          <b>st_ility</b>
        </tt>
      </a>,&nbsp;&nbsp;</p>
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